Merge tag '3.6.0' into refresh_paths

Bump to 3.6.0

- Introduce support of add and del operations for overrides
- OTP-21 compatibility
- Bump cth_readable for OTP-21 compat
- upgrade relx to 3.25.0
- upgrade bbmustache to 1.5.0
- run compile provider in default namespace from bare compiling (fixes
  hooks for mix builds)
- Resolve string vs list crashing rebar3 in erl_first_files
- Create ERLANG_LIB_*_erl_interface environment variables only if erl_interface exists
- Add hooks to the upgrade command
- Add --start-clean flag to rebar3 shell
- Auto-boot main app in OTP app project templates
- Use maps for child spec examples in templates

1 files changed, 8 insertions, 0 deletions

diff --git a/src/rebar_erlc_compiler.erl b/src/rebar_erlc_compiler.erl
index c588a25..ebdd9dd 100644
--- a/src/rebar_erlc_compiler.erl
+++ b/src/rebar_erlc_compiler.erl
@@ -285,6 +285,7 @@ gather_src(Opts, BaseDirParts, [Dir|Rest], Srcs, CompileOpts) ->
 %% files, so that yet to be compiled parse transformations are excluded from it.
 erl_first_files(Opts, ErlOpts, Dir, NeededErlFiles) ->
     ErlFirstFilesConf = rebar_opts:get(Opts, erl_first_files, []),
+    valid_erl_first_conf(ErlFirstFilesConf),
     NeededSrcDirs = lists:usort(lists:map(fun filename:dirname/1, NeededErlFiles)),
     %% NOTE: order of files here is important!
     ErlFirstFiles =
@@ -796,3 +797,10 @@ dir_recursive(Opts, Dir, CompileOpts) when is_list(CompileOpts) ->
         undefined -> rebar_dir:recursive(Opts, Dir);
         Recursive -> Recursive
     end.
+
+valid_erl_first_conf(FileList) ->
+    case rebar_utils:is_list_of_strings(FileList) of
+        true -> true;
+        false -> ?ABORT("An invalid file list (~p) was provided as part of your erl_files_first directive",
+                        [FileList])
+    end.